Fluoride in Minnesota well water
In Minnesota, <1% of 11,482 tested private well samples exceeded the EPA limit for fluoride (4 mg/L).
Natural fluoride in bedrock wells can exceed the limit. Above 4 mg/L long-term exposure causes skeletal fluorosis; above 2 mg/L children can develop tooth mottling.
Check your fluoride number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Test your Minnesota well for fluoride
Certified lab analysis of your own tap water, bottles and prepaid return shipping included. The Essential well panel covers arsenic, uranium, nitrate, lead, copper, manganese, iron, sodium and bacteria; radon and PFAS are add-ons.
Order the Tap Score well water test kit, from $209Already tested? Upload the report
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Systems that remove fluoride
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Some links below are affiliate links. If you buy through one, the merchant pays us a commission at no extra cost to you. It does not change which products we list or what the data says.
For fluoride
Under-sink reverse osmosis system
under-sink or countertop, about $300
Look for NSF/ANSI 58 certification listing the contaminant you need removed.
For fluoride
Aquasana SmartFlow reverse osmosis
under-sink or countertop, about $225
Certified to NSF/ANSI 58 and 53 to reduce arsenic (96%, pentavalent), fluoride (90%), lead (99%), nitrate, nitrite and PFOA/PFOS at the kitchen tap, with a remineralizer.
Rather have it installed and sized for your well? Book a free in-home water test with a licensed local company.
Where to get a well tested for fluoride in Minnesota: certified labs, state programs and prices.
By county, from individual samples
Public monitoring samples against the EPA limit (4 mg/L); counties with at least 30 samples.
| County | Above EPA limit | Samples | Detected | Median | Highest |
|---|---|---|---|---|---|
| Wilkin | 39 | 97% | 0.5 | 7.5 mg/L | |
| Lyon | 58 | 100% | 0.4 | 4.4 mg/L | |
| Carver | 99 | 98% | 0.237 | 8.1 mg/L | |
| Redwood | 210 | 98% | 0.32 | 4.3 mg/L | |
| Nobles | 118 | 92% | 0.29 | 6 mg/L | |
| Lac qui Parle | 129 | 99% | 0.31 | 4.02 mg/L | |
| Lake | 166 | 91% | 0.2 | 5.34 mg/L | |
| Pine | 168 | 76% | 0.126 | 6.62 mg/L | |
| St. Louis | 442 | 83% | 0.21 | 4.09 mg/L | |
| Murray | 32 | 100% | 0.4 | 1.42 mg/L | |
| Yellow Medicine | 66 | 100% | 0.33 | 1.21 mg/L | |
| Swift | 57 | 100% | 0.27 | 2.02 mg/L | |
| Marshall | 68 | 100% | 0.4 | 1.1 mg/L | |
| Sibley | 124 | 99% | 0.23 | 0.97 mg/L | |
| Steele | 120 | 99% | 0.24 | 0.4 mg/L |
- Fridley, Anoka County0% of 70
- Castle Rock township, Dakota County0% of 33
- Fall Lake township, Lake County0% of 48
- Brooklyn Center, Hennepin County0% of 119
- Lake No. 2 UT, Lake County0% of 34
- Hibbing, St. Louis County0% of 42
- Coon Rapids, Anoka County0% of 38
- Becker township, Sherburne County0% of 43
- Vermillion township, Dakota County0% of 47
- St. Louis Park, Hennepin County0% of 37
- Stony River township, Lake County0% of 36
- Big Lake township, Sherburne County0% of 58
- Marshan township, Dakota County0% of 42
- Clear Lake township, Sherburne County0% of 42
- Baldwin township, Sherburne County0% of 32
- Inver Grove Heights, Dakota County0% of 34
- Waite Park, Stearns County0% of 82
- Cottage Grove, Washington County0% of 85
- Perham township, Otter Tail County0% of 59
- Empire, Dakota County0% of 36
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. fluoride counts and shares are listed on each county and town page with their sources.